Big Sam couldn't have been given a warmer welcome by those who were so keen to turn their backs on him. A standing ovation before the game and a cry of "Big Sam, Give us a wave!" after just 19 minutes.
"After Newcastle, my fear was that others would think I couldn't handle a big club." Allardyce said. "That all those other years I'd had in the game would be forgotten.
"For a time I was really down and depressed. I was thinking 'why has this happened to me?' You take a little time to get over it, but I never thought I wouldn't be back."
Blackburn's gain? Well, Allardyce still has some way to go before he can say he has achieved the mission of saving Rovers from relegation, but this was no bad start.
Victory brings momentum and Allardyce, famed for breaking seasons into manageable chunks while at Bolton, will view this as the first victory in a run of games that must bring more – and quickly.